Check out these free Printable Alphabet Flash Cards, the theme is based on animals, and are excellent for use in letter recognition in early learning. This download contains 26 flash cards, 4 per A4 sheet. For durability try printing onto card, and use a craft knife and ruler or a guillotine for a clean cut (if you have them). If you are keeping the cards for a long time, laminating will protect them for long term use in the class room.
Please leave a comment if you would like to request any particular flash cards, there will be more themes released later on.